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The IBM Information Management System (IMS) is a joint hierarchical database and information management system that supports transaction processing. [1] Development began in 1966 to keep track of the bill of materials for the Saturn V rocket of the Apollo program, and the first version on the IBM System/360 Model 65 was completed in 1967 as ICS/DL/I and officially installed in August 1968.
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The program is also used to mount the new file system. At the time the file system is mounted, the handler is registered with the kernel. If a user now issues read/write/stat requests for this newly mounted file system, the kernel forwards these IO-requests to the handler and then sends the handler's response back to the user.
The filesystem appears as one rooted tree of directories. [1] Instead of addressing separate volumes such as disk partitions, removable media, and network shares as separate trees (as done in DOS and Windows: each drive has a drive letter that denotes the root of its file system tree), such volumes can be mounted on a directory, causing the volume's file system tree to appear as that directory ...
The programming APIs for IMS are the same format and syntax as introduced originally. But they have been updated to be aware of IMS if running there and to use ESAF. Further, the ola.rar file that implements the JCA resource adapter for WAS must be the one shipped with Fixpack 7.0.0.12 or later to use with IMS.
File system Creator Year of introduction Original operating system; DECtape: DEC: 1964 PDP-6 Monitor OS/3x0 FS: IBM: 1964 OS/360: Level-D DEC: 1968 TOPS-10: George 3 ICT (later ICL) 1968 George 3: Version 6 Unix file system (V6FS) Bell Labs: 1972 Version 6 Unix: RT-11 file system DEC: 1973 RT-11: Disk Operating System GEC: 1973 Core Operating ...
Virtual Storage Access Method (VSAM) [1] is an IBM direct-access storage device (DASD) file storage access method, first used in the OS/VS1, OS/VS2 Release 1 (SVS) and Release 2 (MVS) operating systems, later used throughout the Multiple Virtual Storage (MVS) architecture and now in z/OS.
In computing, the Global File System 2 (GFS2) is a shared-disk file system for Linux computer clusters. GFS2 allows all members of a cluster to have direct concurrent access to the same shared block storage , in contrast to distributed file systems which distribute data throughout the cluster.